Home Additions in Chicagoland

Leonard Construction LLC builds home additions for Arlington Heights homeowners who need more space without moving.

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  • Added square footage increases your home's resale value in a high-demand Arlington Heights market
  • Foundation work built to the local 42-inch frost depth requirement prevents heaving and structural shifts
  • New addition is matched to your home's existing roofline, siding, and framing for a seamless exterior look
  • Expanded living space eliminates the cost and disruption of selling and relocating
  • Dedicated rooms for remote work, aging family members, or growing kids improve daily function
  • Full-scope management from Village plan review through final inspection keeps your project on track
A newly completed single-story home addition on a residential property in Arlington Heights, Illinois, showing matched exterior siding and a seamless roofline connection to the original house structure. The addition includes a large window facing the backyard, consistent with the surrounding neighborhood's established home styles.

Expert Home Additions in Chicagoland

Home additions in Arlington Heights give you more living space while keeping you in the neighborhood you know. At Leonard Construction LLC, we handle the full scope of residential addition work, from room additions and second-story builds to family room expansions and attached garage conversions. Arlington Heights sits in IECC Climate Zone 5A, which means foundations must reach a 42-inch frost depth. We build to that standard on every project so your addition stays level and stable through Illinois winters. The Village of Arlington Heights requires plan review and building permits for all additions, and our team manages that process from drawing submission through final inspection. Many Arlington Heights homes were built decades ago with layouts that no longer fit how families live today. Whether you need a dedicated home office, a larger primary suite, or a main-floor bedroom for an aging parent, we design the addition to match your home's existing structure and exterior. Call us to schedule a site visit and get a clear scope for your project.

What's included

  • Added square footage increases your home's resale value in a high-demand Arlington Heights market
  • Foundation work built to the local 42-inch frost depth requirement prevents heaving and structural shifts
  • New addition is matched to your home's existing roofline, siding, and framing for a seamless exterior look
  • Expanded living space eliminates the cost and disruption of selling and relocating
  • Dedicated rooms for remote work, aging family members, or growing kids improve daily function
  • Full-scope management from Village plan review through final inspection keeps your project on track
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Home Additions FAQ

Common questions about home additions in Chicagoland.

Yes, we manage the permit and plan review process with the Village of Arlington Heights on your behalf. You do not need to file paperwork or coordinate with the building department yourself.

We build room additions, second-story additions, family room expansions, and main-floor bedroom additions in Arlington Heights. Each project is scoped to match your home's existing structure and layout.

Yes, we design the addition to align with your home's current roofline, exterior finish, and framing. The goal is a result that looks like it was always part of the original structure.

Arlington Heights is in a northern climate zone that requires foundations to reach a 42-inch frost depth. We build every addition foundation to that local standard to prevent shifting or heaving over time.

For many Arlington Heights homeowners, an addition costs less and causes less disruption than selling, buying, and moving. You stay in your neighborhood and gain the specific space your household needs.

A general idea of which room or area you want to expand is enough to get started in Arlington Heights. We will assess your lot, existing structure, and goals during the initial site visit.

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What Cook County homeowners say.

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3 Google reviews

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Leonard Construction did a fantastic job on our kitchen remodel. Curtis was easy to communicate with and the finished space looks exactly like what we had in mind.

Maria T. Google review

We hired them for a bathroom renovation and were impressed by how clean and organized the crew kept everything. The work quality was excellent and we'd hire them again without hesitation.

James R. Google review

From the first estimate to the final walkthrough, Leonard Construction was professional and straightforward. Our renovated space turned out better than we expected.

Sandra K. Google review

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Hours

  • Monday 7:00 AM - 6:00 PM
  • Tuesday 7:00 AM - 6:00 PM
  • Wednesday 7:00 AM - 6:00 PM
  • Thursday 7:00 AM - 6:00 PM
  • Friday 7:00 AM - 6:00 PM
  • Saturday 9:00 AM - 3:00 PM
  • Sunday Closed